Pumping apparatus



oct'. 28,1952 w, J. CQNERY 2,615,397

PUMPING APPARA'IUSl l Filed April 7, 1949 3 Sheets-Sheet 1 ATTOFNE YSOct. 28, 1952 w J, CONERY n 2,615,397-

PUMPING APPARATUS 3 Sheets-Sheet 2 Filed April 7, 1949 BY fw@ MMM Oct28, 1952 w. J. coNERY PUMPING ,APPARATUS 3 Sheets-Sheet 5 Filed April 7,1949 INVENTOR WILL/AM J MNE/BY "MM f M Patented Oct. 28, 1952 UNITEDPUMPING APPARATUS William J. Colmery, Ashland, Ohio, assignor to 'The F.AE. Meyers & Bro. Co., Ashland, Ohio,'a.

corporation of Ohio Application April 7, 1949, Serial N0.'85,983

Claims. 1

The present invention relates to pumping apparatus or systems,particularly those of the jet type, and is concerned primarily withpumps that are adapted to be converted from shallow to deep Well orvice-versa with simple *changes in the connections.

Various types of combined jet-centrifugal pumps are being'produced bypump manufacturlers `and intended to be converted from deep to 4acterVin making the'substitution or replacement of parts duringvthe convertingoperation. Moreover, in those pumps inA which the jet unit is containedin the combined air vseparator priming chamber vdifficulty has been4experienced in making adequate provision for connecting the air volumecontrol to the suction side of the centrifugal pump, particularly whenit becomes necessary to change the operation of the pump over fromshallow Well to deep well.

In an attempt to avoid this diiiiculty the art has either removed thejet pump toa position eX- terior of the priming chamber Where it is moreaccessible, or else the automatic. air volume control connectionhas'beenleft off entirely. However, When the jet pump is positioned remote fromthe chamber and is not contained Within the chamber, the latternecessarily must be made relatively small in orderthat the overalldimensions of the pump assembly will not beunduly large and in this casethe'degree of ai'r separation is .reduced kin corresponding amount. Onthe other hand, .when the automatic air volume control is omittedentirely, the necessary. air cushioning effectat the pneumaticpressuretank vcannotbe obtained so that the system does not operatesatisfactorily. y

Still another difficulty found in manufacturing and operation of pumps.of this character, particularly when designed for'optional shallow ordeep Well use, is that the individual parts cannotbe readily removedvfor inspection or replace- -ment without also removingvthe mainportions `particularly when forming-part of a relatively large pump, soy'that the vinspectionof thepump as well as theremoval-'of any parts forgquick conversion vrepresents considerable work.

'Therprimary object-of the presentinvention is to provide a pump Aof thejet-centrifugal type adapted for both shallow and deep wellfuse and inwhich the conversion from shallow to deep Well and vice-versa is'accomplished with a minimum of eifort and involves the substitution ofthe simplest type of parts.

Another object is to provide a pump of the type noted and in which thejet unit is contained within a combined, totally Aenclosed. airseparatorpriming chamber and yet the jet pump can be removed as aunitand an accessory substituted therefor for use when thepump isarranged for deep Well operation.

Another object istop'rovide a pump of the character described with acombined air separator-priming chamber and in which the nozzle anddiffuser elements vof the jet pump are attached together in properspacing Within the chamber and can be removed as a unit forconversion todeep well use Without having to remove the chamber.

Another object is to provide an improved pump of the type noted having arelatively large combined air separator-priming chamber containing adetachable jet pump unit and in which the only change necessary forconverting the pump to deep well operation is the substitution of atubular member for the jet pump unit, the change being made Without'disturbing the chamber other than removing the jet pump unit.

Still another object is to provide an improved convertible pump having acombined airseparating and priming l chamber .containing a jet pumpunit, the latter being presented to the suction side of the centrifugalpump unittogether with a device forintroducing air tothe centrifugalpump.

Still another object is to provide an improved pump, convertible fromshallow to. deep Well and vice-versa, having a combined air separatingand priming chamber containing a jet pump unit presented tothe suctionside of a centrifugalrpump unit, together wih a device forintroducing'air to the centrifugal pump and in which conversion of thepump from shallowto deep well can be accomplished without interfering-in any Way with the air introducing/device.

Another object is'to providea pump'of the type noted having a combinedair separating :and

inlet device connected to the suction inlet of the centrifugalpump-andremovable With the pump from the chamber when itis desired toinspect 0r replace any of ,theparts Figure v3;

vAnother object of my invention is to provide a pumping system in whichthe pressure or centrifugal pump is mounted with its axis of rotationhorizontal and Which comprises the'combination of a jet pump,a'press"ure"pump,yand a combined air separating and priming chambercontaining each of the jet and pressure pumps so arranged that whenconverting to deep Well use the jet pump parts can be removed as av unitfrom the chamber without disturbing either the chamber or the pressurepump. -f

A further Object of the invention is to provide a pumping system inwhich the pressure'v or centrifugal pump'is mountedwith :its axisr ofrota tion horizontaland -discharging into v a chamber of relativelylarge size containing a jet pump unit in communication with the chamberand so constructed and-arranged-that the jet pump A.unit can be removedfrom thech'amber -at one side thereof ^and the pressure pump can be.removed from the chamber at the other side thereof.. I f y y Thegeneral and nal object of my inventionis to provide a jet type pumpingapparatus or system including a combined air separatohpriming chamber ofrelatively large size and .which may be converted from a shallow wellpumping system to a deep Well pumpingsystem o r v'icefversa atconsiderably less expense than the apparatus or systems on the marketand readily Vvaccomplished by a farmer or other mechanically'unskilledperson without necessitating the dismantling of the pump.

Other objects and advantages of my invention will be apparent as thespecification is perused in connection with the accompanyingdrawings inwhich: i

Figurel representsr a side relevational View, partly in section, of thegeneral assembly of the improved pump when setup for shallow Welloperation;

Figure 2 is ay sectional Adeitailed view, partly in i elevation, -of.the air volume r'control :apparatus adapted for use in the pump shownin Figure l; Figure 3 is a sectional view ofthe jet pump unit used inthe shallow installation; l,

Figure 4 is an elevational viewlooking toward the left-hand end of thejet pump shown in Figure3; Y Figure 5Y is an'elevational Viewlookingtoward the right-hand end of the jet' pump' sho'win Figure 6 'is asectional view of la detail coupling used in'placeof the jetpumpfof'Figure 3-when the main-pump assembly is being "converted" todeep well operation; Y

Figure 'I is an elevationalview looking'toward the left-hand end of thedevice' shown in Figure 6;

Figure 8 shows diagrammatically the general pump assembly when set upfor shallow well use; and

Figure 9 represents, in part diagrammatically and partly in section, thepump assembly when arranged for deep well use.

Referring more particularly to'Figurerl, the

'pump assembly includes the three main parts,

the motor generally designated at vI,.t11e motor bracket designated at 2and the combined air separating-priming chamber generally indicated at3. The motor may be of any suitable type and has attached thereto apressure operated switch 4 which serves to interrupt the electricalcircuit (not shown) to the motor when the pressure in the chamber 3becomes greater than a predetermined amount as will bedescribed morefully hereinafter. The mounting flange of the motor is attached 4to thebracket 2 by means of bolts 5 which pass through bossed portions of thebracket into the motor mounting iange.

The bracket constitutes a hollow casting provided with spacedv ribs 6and terminating at the bottom in feet 'I which may be bolted to afoundation at the position of the heavy washers 8. There are open spacesbetween the ribs 6 and these spaces aretemporarily closed to preventdustfror'n entering by means of a sheet steel ilexible covering 9 whichis 'positioned between shoulders- I0 and theends of which are attachedto the bracket byr'means of screws lI I. y .y

The motor is provided with a shaft I2 Which is snugly received by anapertured shoulder I3 having set screws-I4, this shoulder being formedby an extension of an impeller shaft I5 which terminates in a threadedplug -portion I6.y The shaft- I5 extends through-a suitable seal I'I andcarries at its end an impeller I8 of any suitable and Well-known typewhich constitutes a pressure pump. This impeller contains vanes I9 ,anda suction inletconduit 2U. There is a pump casing 2I positioned aboutthe impeller, the righthand half of the casing terminating in a hub 22for receiving ,the seal-member I'I. This portion of the pump casingmaylbe formed integral with the motor bracket 2 inone completecasting asindicated on the drawings. The other half of the casing terminates in athreaded shoulder 23.

. This lshoulder portion is provided with an annular recess 24Vvforreceiving a rubber bearing 25 immediately surrounding the suctioninlet member 2|] of the pump. The peripheral portion of the left-handcasing member terminates in an annular vane plate which provides spiralpassageways for the water leaving the impeller and discharges this waterthrough suitably positioned ports (not shown) into the chamber 3. Theleft-hand casing half ,can be detachably secured to the right-.handportion of the casing and therefore tovthemotorlbracket 2 by means ofsuitably positioned bolts 21. 1

The combined air separatorfpriming chamber 3 may be formed of arelatively large hollow casting 28 which is completely closed .exceptfor relatively small threaded openings for receiving pipes, `as will beexplained hereinafter, and also except for a centrally disposed opening29 in the right-hand Wall for snugly receiving a shouldered surface 30of the motor bracket 2. The latter can be detachably secured to the wallof the casing by means of suitably positionedbolts 3I which Vbearagainst bosses. 32 yformed on the interior of the bracket casting.

The casting '28 is provided witheribs indicated at. 33 forstrengthening, purposes. A threaded bore is. adapted detachably'toreceive the threadedshank 40 of a jet pump which is ycomprisedessentially of a nozzle`4l and a diffuser 'orf'v'enthreaded countersunkopening 44 for receiving the threaded end of :a pipe 45 (Figure'l)constituting the suction conduitl which normally passes down into thewell as indicated in Figure 8. If desired, a a foot valve maybeernployed at the bottom of the suction pipe in the well in order tomaintain the primingchamber 3 filled with'water. The shank 'portion 4i)of the jet pump unit is provided with a reentrant passageway 46 (Figure3) of curvilinear shape :and terminating in a ycircular opening 41 whichis in line with the interior of the nozzle element 4|.

The latter is threadedly vreceived as indicated at 48 by the reentrantportion of the member 40 and a hexagon collar 49 may be provided sofas.to assist in tightening .the nozzle element into the body 40. The tip50 ofthe nozzle is of smaller size than the inwardly flaring portion 5Iof the diiuser 42 so as to leave an annular space around the outersurface of rthe nozzle. This space communicates throughv asemi-circular;

passageway 52 -with the opening 44 so that a free passage is establishedbetween the suction pipe 45 and the interior ofy the diffuser 42 aroundthe nozzle 4I. Inv addition, communication is also established betweenthe interior'of the chamber 3 and the interior of the nozzle 4| throughthe passageway 45. In order that the water flowing from the chamber 3 tothe nozzle interior is directed gently toward the passageway 46 thechamber 3 may be provided with arfslantedpr tapering surface indicatedat 53, thus insuring no eddy current or intense friction losses.

The diffuser 42 is provided with an annular projection 54 having acircular groove 55 for receiving a washer 56, preferably of circularcross-sectional area. The projection 54 vprovides an abutment 51 formaking a tight joint with the body 40 when the diluser is screwed asindicated at 58 into that body portion.

To facilitate this screwing eiect, a hexagonally-shaped portion 5d maybe furnished on the diffuser to receive a wrench. It is therefore seenthat when the body portion 4the nozzle 4l and the diffuser 42 aredetachably joined together at the threads 48 and 58, the positionalrelationship between these parts is absolutely fixed andy that by merelyunscrewing the body portionat the threads 39 in the wall of the chamber3, the

entire unit, including the nozzle and the diffuser can be removediromthe interior of the chamber, leaving merely a threaded opening in thewall. The purpose of this .opening in connection withA the conversion ofthe pump to deep well will be explained hereinafter.

There is a metal tube 60 (Figure 1) 23 rto the left-hand half of thepump casing, this tube fitting snugly about the washer 56 and extendingpreferably to a position just beyond the shoulder or projection 54 butnot covering up the opening 46. A coniined annular space is thuspresented about the outside surface of the diffuser 42. Thetip 6l ofthediiuserhas-a diameter somewhat less than the diametral sizeof theimpeller inlet tube 2i) and .the space between thetube 60 and thediuser-42 is in vcommunithreaded atv 6 lcation vvwith' the suction inletof the pressure pumpllus.

`Inzadditionfto the large threaded lopenings 31, "39, the chamber 3 hasa threaded opening 62. at ithe vbottomfside which is vshown asreceiving-a plug T63.

'It is '-welll'known that in order to provide an air cushion at thetopof va pneumatictankrto supply continuous pressure to the storedwater, some-form of automaticair volume controlmustbefemployedvbywhichair is introduced into the 'tank at apredeterminedrate, dependent on the loss of air froxnthe tank when the water is beingdischarged :to the `service pipes. For this Ypurpose there is provided acopper tubing 64 passing through the wall of cylinder `|50 and brazedthereto as Aindicated atv 65, this tubing beingexible as indicated byits curvilinear shape `in FigureZ and inserted into a slidably fitted'ope-'ning GS'formedrin -the'vane plate. This opening communicates withan elbow 61 threadedly secured to the left-hand wall of. thermotor'bracket2. There is a pipe B3 lwhich leadsrinto tha-elbow Vthrough-aSchrader valve 69 and iis connected to an air volume control valve 10vof any suitable `and well-known type secured toa pneumatic tankindicated at 1 I By means of a oat mechanism within the tank which movesin accordance with changes in level of water and therefore representsthechange in the amount of air at the top of the tank,a `valve is opened toadmit air tothe `pipe '68 and this airgpassesithrough the tube E4 .andiinallyreaches the suction inlet of the pressure pump as explainedhereinbefore.

The casting 28 is provided with. a relatively "smallropening 12 ataposition near the threaded opening `31 for-receiving a pipe coupling 13Aattached to asmall conduit or pipe 14 leading to `vthe pressureresponsive switch A4 on the .'motor.

`As lthe pressureofrthe fluid in the chamber 3 exceeds a predeterminedamount, this pressure .iscommunicated-'to the uid in the pipe l.14 to`cause the switch .4 to .break the circuit leading to theimotor il. ilWhen water is drawn oif'at the pipe-'pwhich may be a service pipe ormay lead e to a pneumatic pressure tank so as to reduce'the `pressure.of the Ifluidin theY chamber l3, 'the reductioninpressure causes theswitch 4to become energized randreestablish themotor circuit. Thegauge35'has no automatic featurefbut is used simply to show the primingconditions of the pump in terms of the pressure of the fluid inthechamber3.

The setup shown in`Figure 1 is intended for Ashallow well use, i. e.'for suction Aheads no greater lthan-"20 to 25 it. In order to adapt thepump structure to deep well operation, i. e. above2-5 ft., itdsobviousthat the jet pump must be removed andzplaced downrnea'r the water inthewe1l,pref

erablyvsubmerged, in orderto combine the lifting effects-of the jet-pumpwith the suction'e'ff'ect of thefpressure pump. F'or this purposeanaccessory or-adaptor is provided for replacing the jet lpump an'dwthisaccessory is shown in Figures 6 and y'1. It consistsmainly in amulti-shouldered tube offmetal having a hexagon head 15 Vthreaded asindicatedat 16 .toreceive the delivery pipe 11 `from `the submerged jetDump. There is a 'threaded shouiderlzfor engaging thethreads ofthebore39.

The purpose of this plug lwillbe de# scribedhereinafter.

'8| snugly `fits against the cylinder 60 and, as in the case of thewasher 56, serves to prevent any uid from moving toward the left in thecylinder 60. It is obvious that when the tube accessory shown in Figure6 `is screwed into the casting 28,

assuming that the jet pump 4|, 42 has been previously removed, theopening 82 in the tube is directly in line with the axis of the`cylinder 6D and therefore coaxial with the suction inlet of thepressure pump I 8. Inasmuch as the washer 8| is positioned within thecylinder to the left of the tubing 4(i4 and its Schrader valve, the aircontrol device is no-t disturbed but is available for deep well 'use asyfor shallow Well operation.

The plug 63 at the bottom of the chamber 3 removed to receive fthethreaded end of a pressure pipe 83. The jet pump for deep well operationis usually positioned just below the level of the water in the well orother source of fluid and *mayl comprise a nozzle 84 and a cooperatingdiffuser or venturi 85. The pressure pipe 83 is connected lthrough :anelbow 86 and a dro-p pipe 81 lto "a body casting 88 having a curvedpassageway which terminates at the nozzle 8f4. The tip of the nozzle isspaced a'distance from the lower end of the diffuser 85 to leave anannular space 89 which communicates through passageways in the casting88 to a, suction compartment .90. This compartment is in communicationthrough a pipe 9| with a foot valve structure 92 of any suitable andwell-known .type which terminates at the bottom in a strainer 93.

The diffuser 85 may `compri-se `a tubing of hard ber or metal and isdetachably secured .within 'a pipe 94, the latter being connectedthroughan extension 95 and an elbow 96 to the delivery pipe 11.

It is therefore apparent that in order to change over the shallow wellstructure as shown in Figures 1 and 8 to deep well operation i-t isnecessary to replace the jet pump elements 4|, 42vwhich are normallycontained within the chamber 3, by the tubular adaptor shown in Figure 6and then remove the plug 63 and substitute therefor the pressure pipe83. -In removing the shallow well jet pump unit, it is simply necessaryto unscrew the member 40 .to leave the opening 39, at which time the jetpump can be freely withdrawn through the opening without ldisturbinglthe casing or chamber 3 and also without affecting the air controlvalve connection 64.

The operation of the pump is essentially the same for shallow and deepwell use except for the change in position of the jet pump. Combinedwaiter and air entering the suction pipe 45 flows -past the outersurface of the nozzle 4| into the space thence through the venturi 42into the suction inlet of the pressure pump. The water is deliveredunder pressure at the discharge openingsof the vane plate 26 into thecombined air separator and priming chamber 3. The sepaf rated air risesto the top of the cham-ber and flows out through the main discharge pipe36 together with the service water. This pipe may be conF nected to apneumatic pressure tank and the air contained in the water collectsatrthe top of the tank to provide a pneumatic cushion. The water Vfromwhich air has been separated ows downwar-diy through the opening 46 tothe bore in fthe nozzle 4| and creates ya suction `effect between theknozzle and the diffuser sufficiently intense that -s-not"sufcient to4provide the necessarypresl sure to service the water, the -automatic airvolunie control 'I0 will opera-te to ladmit additional air through thetube 64 and the Schr-ader valve 69 into the cylinder 60. This air intraveling through the pressure pump, isv separated in the chamber 3 fromthe water, finally passing out through the pipe 36 to the tank.

It will be noted that the jet pump unit is contained entirely within thechamber 3, or rather, this chamber has been greatly enlarged so as toextend to the rear of the jet pump. Moreover, the main discharge pipe 36is taken out from the chamber, as close to the top as possible and thevnozzle 4| of the jet pump is positioned remote from the main dischargepipe.

From the structural standpoint, the improved pump offers distinctadvantages in that not only can the jet pump be readily removed from thecasing in the manner described, but thev pressure pump can also bereadily detached from the casing 3 for inspection or replacementpurposes. This is readily done by removing or loosening the bolts 'orcap screws 3| (assuming that the pipe coupling 'I3 leading to the switch4 has also been disconnected) at which time the motor bracket 2 and themotor can be moved relative to the casing 3, carrying with it the entirepressure pump structure including the cylinder 60. In order to obtain'access to the cap screws 3|, it will be necessary vdisassembled byremoving the cap screws 21.

Inasmuch as the end of the tube 64 is brazed in the cylinder 69, itmight be 'diiiicult to insert the opposite end of the tubinginto theopening 65 in the vane plate and for this reason it is desirable to makethe tubing 64 of flexible material as indicated, particularly in Figure2, so that regardless of the peripheral position of the brazed end withrespect to the opening 66, the tubing can be `V readily inserted intothe opening` When the pump is arranged for deep well operation,including the insertion of the tube element 19 (Figure 6), and assumingthat the jet pump body 88 is submerged in the water of the well, thewater passes through the foot Valve 92 into the spaces 90 and 89, thenceup through the diffuser to the inlet conduit 20 of the pressure pump.Air is separated from the water in the chamber 3 as explainedhereinbefore and the treated water flows to the bottom of the chamberand through the pipe 83 to the nozzle 84 in order Vto enhance thesuction effect between the nozzle and the diiuser. Thus the submergedjet pump assists the pressure pump in lifting the water through the deepwell pipes and the separated rair and water flow out through the servicepipe 36. It will be` noted that the air control device functions equallywell for deep as for shallow well operation because in both cases thepipe 64 is in communication with the suction side of the pressure pump.

It will be further observed that the position within the chamber 3 atwhich the separated air collects, namely at the top of the chamber, isremote from the position at which water is Withdrawn from the chamber todrive the submerged jet pump, so that the water arriving at the nozzle84 has' had the objectionable part of the air re- 'moved. The pressurepump will therefore never 59.5 tion tojserving as an eectivefairseparator, serves the function of a priming chamber to the extent that aconsiderable head .0f Water is always maintained'on the pressure pump,assuming that the chamber is initially filled with water and thislastmentioned condition is assured by the use of the foot valve 92 whichprevents anyvvater from dropping out of. the pipes 11,83, The vSuctionpipe 45 of the shallow well installation is" also preferably providedwith a foot valve (not shown) for the reason given immediately above.

It will be understood that various modiiications and arrangements instructure could be made without departing from the spirit of myinvention and, accordingly, I desire to comprehend such modificationsand substitutions of equivalents as may be considered to come within thescope of the appended claims.

I claim:

1. A pumping apparatus comprising a pressure pump having inlet anddischarge openings, a removable jet pump presented to the inlet openingof the pressure pump, a combined air separator and priming chambercommunicating with the discharge opening of the pressure pump and withthe jet pump in order to supply substantially air free water to the jetpump, a cylinder surrounding a portion of the jet pump and coaxial withthe inlet opening of the pressure pump leaving a space between thecylinder and the jet pump, and means including a conduit fixedly securedto said cylinder for supplying predetermined amounts of air to the spacebetween the cylinder and the jet pump, the size of the inlet opening ofthe pressure pump being greater `than the size of the jet pump in orderto leave an annular space through which the introduced air can flow intothe pressure pump, and said air-introducing conduit being adapted toremain fixed to said cylinder when the jet pump is being removed fromsaid cylinder.

2. A pumping apparatus comprising a pressure pump having inlet anddischarge openings, a removable jet pump formed of a nozzle and acooperating diiuser, said diffuser being presented to the inlet openingof the pressure pump, a combined air separator and priming chambercommunicating with the discharge opening of the pressure pump and withthe nozzle of the jet pump, means for supplying the space between saidnozzle and diffuser with uid, a main discharge pipe connected to saidchamber, the jet pump being contained within the chamber, a cylindricalmember surrounding a portion of the jet pump to leave a spacecommunicating with the inlet opening of the pressure pump beyond thediiuser, and means including a conduit fixedly secured to said cylinderfor supplying pre'- determined amounts of air to the space within saidmember in order to provide pneumatic pressure effects to the waterdischarged through said main discharge pipe, and said air-introducingconduit being adapted to remain fixed to said cylinder' when the -jetpump is being removed from said cylinder.

3. in a convertible deep and shallow well pump, the combination of adistribution casing having a pair of spaced, opposed walls, a pressurepump operatively mounted in one of the walls and having a suction inletand a pressure outlet, saidoutlet communicating withsaid casing, a ypairof openings in the other of said Walls, a fitting in one of saidopenings in line with the suction inlet of the pump, and a removableplug in the other of said openings, a tubular member extending overl atleast abortion., of nSaid .casing andsupported at one end ;bythe .pump,`a removable jet pump` assembly contained, at least in part, within thetubular mem-ber and presented to the suction inlet of thepressurei'p'ump, said jet pump v assembly. comprising anozzle and adiffuser in spaced relationship and supported.- at one-end by saidfitting, said v nozzle being vin,

with the interior Yof sav'd' casing andthe space betweensaid nozzle anddiffuser. being connected togan externalsource of uidithrough saidfitting, and a main discharge opening in said casing, said tubularmember being of greater size than the jet pump assembly to leave anannular space therebetween a sealing ring in said space, posi#- tionedbetween the member and the jet pump, near one end of the jet pump, thatpo-rtion of the annular space between the sealingring and the pressurepump being in communication with the suction inlet of the pressure pump,and means for supplying predetermined amounts of Aair from theatmosphere into said portion of theannular space between the sealingring and the pressure pump in order topresent this air to the suctionside of the pressure pump.

4. A pumping apparatus comprising a pressure 'pump having inlet anddischarge openings, a jet pump formed of a nozzle and a diffuser inspaced relationship, said diffuser beingpresented to the inlet openingof the pressure pumppa combined air separator and priming ychambercommunicating directly with the discharge opening `of the. pressure pumpand with said nozzle, means for means includinga tubing secured to saidtubular member for supplying said space with predetermined amounts ofair from the atmosphere. 5. In a convertible deep andshallow well pump,the combination of a distribution casing having a pair of spaced,opposed walls, afpressure pump operatively mounted in one of the Wallsand having a suction inlet and avpressure outlet, said outletcommunicating with saidcasing, a pair of openings inl the other ofv saidwalls, a ttingin one of said openings in line with the suctio'ninlet lof the pump, and a removable plugin the other of said openings, atubular member extending at least over a portion of said casing andsupported at one end by' the'pump, 'a removable jet pump assemblysupported by saidiitting and mounted,

at least in part, within the tubular member andv presentedy to'thefsuction inletr of the. pressure pump, said jet'pump comprising anozzle and a v' diruser in spaced reiationship, said nozzle being incommunication with the interior of said casing f vand the space betweensaid nozzlev and diiluserl being connected to an external source ofiiuid sure pump, and Ameans including al conduit secured to said tubularmember for introducing controllable amounts of air to the interior ofsaid t munication member in order that the air will ow into the Numbersuction side of the pressure pump. 2,174,960

- WILLIAM J. CONERY. 2,225,789

. REFERENCES CITED 5 2,335,109

' The following references are 4of record in the 13311540 fue of thispatent:

UNITED STATES PATENTS 2549213 Number Name Date Conery et al. Apr. 13,1937 Name Date Barzen Oct. 3, 1939 Metcalfe et al Dec. 24, 1940 LungMar. 3, .1942 Conery Nov. 23, 1943 Brandstrom Aug. 7, 1945 Ruth July 9,1946 Wolfe et a1 July 5, 1949 vMcBean Apr. 17, 1951

